When two atoms with different electronegativities are bonded together, a bond dipole exists. These are displayed with an arrow originating at the atom with the less electronegativity and pointing toward the at

Dipole, less electronegativity,  higher electronegativity

Explanation:

!!! Incomplete Question

When two atoms with different electronegativities are bonded together, a bond dipole exists.

A bond dipole is a partial charge assigned to bonded atoms due to difference in electron density, difference in electronegativity is a factor to this.

These are displayed with an arrow originating at the atom with the less electronegativity and pointing toward the atom with the higher electronegativity value

the dissolution of polymer can be thermodynamically described in 2 steps.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter